i'm carolyn johnson. >> dan: i'm dan ashley. for all of us here, we appreciate your time. we will see you at 9:00 and 11:00. this is "jeopardy!" introducing today's contestants -- an attorney and taiko drummer from houston, texas... ...a performance artist from tallahassee, florida... ...and our returning champion, a strategic analyst for nasa, from huntsville, alabama... and now here is the host of "jeopardy!" -- ex trebek! thanks, johnny. thank you, ladies and gentlemen, and welcome to our program. $6,700 doesn't sound like a lot, and it's not on "jeopardy!" usually our champions average about $15,000, $16,000, but we had a tough final yesterday, but kristin knocked off a four-day champion to take the champion's lectern position. parker and natalie are the challengers, so goo to all three. here we go into the jeopardy! round. and today you have to deal with these categories... alex: kristin, start us. let's start with gee! it's geology for $200. parker. what is a plateau? you got it. i'll take the same category for $400.